Three guys are riding in their truck, drinking beer, having a good ol' time. The driver looks in the mirror and sees the flashing lights of a police car so he pulls over.
The other two are real nervous, "What do we do with our beers? We're in trouble!"
"No," the driver says, "just do this: pull the label off of your beer bottle and stick it to your forehead and let me do the talking."
So they all pull the labels off their beer bottles and stick'em to their foreheads. The policeman walks up and says, "You boys were swerving down the road. Have you been drinking?"
The driver says, "Oh, no officer," and points to his forehead, "We're on the patch, trying to quit."